mass production versus mass customization

what is the difference between mass production and mass customization, and how do the differences affect production processes and constructability of goods??

mass production:

• mass production relies on standardized production of large amounts of products through the uses of an assembly line.
• mass production typically uses moving tracks or conveyor belts to move the objects down the line to the various workers.
• generally, mass production is suited for a large, semi-homogeneous population of consumers.
  
• the process of mass production becomes capital intensive: while the labor costs lower and production rates increase through mass production, the machinery itself requires a great deal of money initially and skilled labor to install the equipment
• advantages: probablity of human error is decreased, quality of goods is increased, reduction in labor costs, reduction of nonproductive effort
• disadvantage: products are hard to alter once assembly line is implemented and established
  

assembly line for Ford Model-T

mass customization:

• according to www.madeforone.com, mass customization enables a customer to decide the exact specification of a product or service, and have that product or service supplied to them at a price close to that for an ordinary mass produced alternative
  
• mass customization typically relies on the use of flexible computer-aided manufacturing systems to produce output which is customized per user
  
• the use of build-to order methods, where an item is not constructed until an order is received, is an important factor in minimizing the cost of mass-customized products
• the product is built to satisfy the needs of the individual customer
• software-based product configurators which make it possible to add/change functionalities of a core product
• often times, if a company offers "individual products," the products are not individually produced, but mass-produced with variants to appear or seem individualized
• the configuration system, or interactive interface, that mediates between the consumer and the manufacturer becomes one of the major components of mass customizer's success - without an easily understood and user-friendly interface, the company will have trouble succeeding
  

sources:
http://en.wikipedia.org/wiki/Mass_production
http://www.madeforone.com/Concepts/MCDefinition.html
http://en.wikipedia.org/wiki/Mass_customization
http://www.architectureweek.com/2005/0223/tools_1-1.html